20891115

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{7369}}^1$

素因数の和:7393

約数の個数: 40

約数和(自身を含む): 42804960

約数和(自身を除く): 21913845

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 315, 405, 567, 945, 2835, 7369, 22107, 36845, 51583, 66321, 110535, 154749, 198963, 257915, 331605, 464247, 596889, 773745, 994815, 1392741, 2321235, 2984445, 4178223, 6963705, 20891115]

約数ペア:

[(1, 20891115), (3, 6963705), (5, 4178223), (7, 2984445), (9, 2321235), (15, 1392741), (21, 994815), (27, 773745), (35, 596889), (45, 464247), (63, 331605), (81, 257915), (105, 198963), (135, 154749), (189, 110535), (315, 66321), (405, 51583), (567, 36845), (945, 22107), (2835, 7369)]